#region License
/*
The MIT License

Copyright (c) 2008 Sky Morey

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#endregion
using System;
using System.Abstract;
namespace Contoso.Primitives.Converters
{
    /// <summary>
    /// ConvertParserBase
    /// </summary>
    public abstract class ConvertParserBase<TResult, TParseAttrib> : IConvertParser, ParserEx.IStringParser<TResult>
    {
        private ParseFormat.TryFunc<string, TParseAttrib, TResult> _tryParse;

        public ConvertParserBase(ParseFormat.TryFunc<string, TParseAttrib, TResult> tryParse)
            : this(tryParse, string.Empty, string.Empty) { }
        public ConvertParserBase(ParseFormat.TryFunc<string, TParseAttrib, TResult> tryParse, object parseDefaultValue, string parseTextDefaultValue)
        {
            ParseDefaultValue = parseDefaultValue;
            ParseTextDefaultValue = parseTextDefaultValue;
            _tryParse = tryParse;
        }

        protected object ParseDefaultValue { get; set; }
        protected string ParseTextDefaultValue { get; set; }

        #region IConvertParser

        public object Parse(string text, object defaultValue, Nparams param)
        {
            TResult value;
            return (_tryParse(text, param.Get<TParseAttrib>(), out value) ? value.ToString() : defaultValue);
        }
        public string Parse(string text, string defaultValue, Nparams param)
        {
            TResult value;
            return (_tryParse(text, param.Get<TParseAttrib>(), out value) ? value.ToString() : defaultValue);
        }
        public bool TryParse(string text, Nparams param, out object value)
        {
            TResult parsedValue;
            bool parsed = _tryParse(text, param.Get<TParseAttrib>(), out parsedValue);
            value = (parsed ? (object)parsedValue : default(TResult));
            return parsed;
        }

        #endregion

        #region IStringParser

        public TResult Parse(string value, TResult defaultValue, Nparams param)
        {
            TResult validValue;
            return (_tryParse(value, param.Get<TParseAttrib>(), out validValue) ? validValue : defaultValue);
        }

        public object Parse2(string value, object defaultValue, Nparams param)
        {
            TResult validValue;
            return (_tryParse(value, param.Get<TParseAttrib>(), out validValue) ? validValue : defaultValue);
        }

        public bool TryParse(string value, Nparams param, out TResult validValue)
        {
            return _tryParse(value, param.Get<TParseAttrib>(), out validValue);
        }

        public bool Validate(string value, Nparams param)
        {
            TResult validValue;
            return _tryParse(value, param.Get<TParseAttrib>(), out validValue);
        }

        #endregion
    }
}